U.S. patent number 8,555,442 [Application Number 13/640,669] was granted by the patent office on 2013-10-15 for transportation and erection integrated machine with displacement platforms and methods for erecting bridge using the same.
This patent grant is currently assigned to Beijing Wowjoint Machinery Co.. The grantee listed for this patent is Yabin Liu, Da Pan, Fude Zhang, Shengjun Zhang. Invention is credited to Yabin Liu, Da Pan, Fude Zhang, Shengjun Zhang.
United States Patent |
8,555,442 |
Liu , et al. |
October 15, 2013 |
Transportation and erection integrated machine with displacement
platforms and methods for erecting bridge using the same
Abstract
The invention provides a special launching carrier with variable
position platform and a method for bridge erection using the same.
The special launching carrier with variable position platform
comprises a special carrier for erection bridge beam and an
under-bridge machine with platform. The special carrier for
erecting beam comprises a main beam, a front wheel group, a rear
wheel group and a lifting device; the under-bridge machine with
platform comprises a under-bridge, a rotatable rear leg, a front
roller, a middle roller, a rear roller and an erecting trolley
arranged on the under-bridge, and the variable position platforms
are installed on both sides of tail portion of the under-bridge.
When erecting bridge beam, the front wheel group moves onto the
variable position platforms, which may be elevated and folded in
terms of conditions of the first and last spans of different
bridges, so that the bridge erection is achieved.
Inventors: |
Liu; Yabin (Beijing,
CN), Zhang; Shengjun (Beijing, CN), Pan;
Da (Beijing, CN), Zhang; Fude (Beijing,
CN) |
Applicant: |
Name |
City |
State |
Country |
Type |
Liu; Yabin
Zhang; Shengjun
Pan; Da
Zhang; Fude |
Beijing
Beijing
Beijing
Beijing |
N/A
N/A
N/A
N/A |
CN
CN
CN
CN |
|
|
Assignee: |
Beijing Wowjoint Machinery Co.
(CN)
|
Family
ID: |
44979020 |
Appl.
No.: |
13/640,669 |
Filed: |
March 28, 2011 |
PCT
Filed: |
March 28, 2011 |
PCT No.: |
PCT/CN2011/000528 |
371(c)(1),(2),(4) Date: |
November 14, 2012 |
PCT
Pub. No.: |
WO2011/143923 |
PCT
Pub. Date: |
November 24, 2011 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20130055512 A1 |
Mar 7, 2013 |
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Foreign Application Priority Data
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May 19, 2010 [CN] |
|
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2010 1 0185308 |
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Current U.S.
Class: |
14/2.5;
14/77.1 |
Current CPC
Class: |
E01D
21/06 (20130101); E01D 21/065 (20130101) |
Current International
Class: |
E01D
21/06 (20060101) |
Field of
Search: |
;14/2.4,2.5,77.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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2767494 |
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Mar 2006 |
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CN |
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101793007 |
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Aug 2010 |
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CN |
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201770947 |
|
Mar 2011 |
|
CN |
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202187297 |
|
Apr 2012 |
|
CN |
|
2005-155160 |
|
Jun 2005 |
|
JP |
|
2006-028881 |
|
Feb 2006 |
|
JP |
|
Other References
"International Application Serial No. PCT/CN2011/000528,
International Search Report mailed Jul. 7, 2011", 4 pgs. cited by
applicant.
|
Primary Examiner: Hartmann; Gary
Attorney, Agent or Firm: Schwegman Lundberg & Woessner,
P.A.
Claims
The invention claimed is:
1. A special launching carrier with variable position platform,
comprising: a special carrier for erecting beam; and an
under-bridge machine with a platform; wherein, said special carrier
for erecting beam comprises a main beam, on which a lifting device
is disposed; front wheel group and a rear wheel group respectively
connected with and disposed under said main beam; said under-bridge
machine with the platform comprises a under-bridge, and also
comprises a front roller, a middle roller and a rear roller,
disposed for supporting said under-bridge and operable to move
along said under-bridge through rollers, and further comprises an
erecting trolley and a set of foldable and elevatable variable
position platforms installed on both sides of tail portion of said
under-bridge, which allows said front wheel group to move from
bridge abutment or bridge deck onto said under-bridge smoothly;
said system further comprises a rotatable rear leg connected with
and disposed under said under-bridge; said rotatable rear leg and
said under-bridge are operable to be on the same line or
perpendicular with each other by rotating said rotatable rear leg
backward and outward; and said rotatable rear leg, said front
roller, said middle roller and said rear roller respectively has a
height regulating device installed thereon, in order to ensure an
appropriate horizontal height of said under-bridge.
2. The system of claim 1, wherein, said horizontal height of said
under-bridge is regulated by altering the lengths of said rotatable
rear leg, said front roller, said middle roller and said rear
roller with said height regulating device.
3. The system of claim 1, wherein, the height of a connection part
of said erecting trolley, which is for connecting with said special
carrier for erecting beam, is regulatable, in order to ensure a
smooth movement of said special carrier for erecting beam when the
under-bridge position on height is changed; when said erecting
trolley moves onto said under-bridge, said erecting trolley is
operable to be connected with said leg(s) fixed on a pier using a
wirerope, said under-bridge is operable to be driven forward and
backward by said erecting trolley through sprocket translation.
4. The system of claim 1, wherein, said under-bridge further
comprises a raising/lowering device, through which a set of said
foldable variable position platforms installed on both sides of
said under-bridge are elevatable; said foldable and elevatable
variable position platforms can be folded to be parallel with said
both sides respectively, and also can be unfolded to be
perpendicular to said both sides respectively.
5. The system of claim 2, wherein, the height of a connection part
of said erecting trolley, which is for connecting with said special
carrier for erecting beam, is regulatable, in order to ensure a
smooth movement of said special carrier for erecting beam when the
under-bridge position on height is changed; when said erecting
trolley moves onto said under-bridge, said erecting trolley is
operable to be connected with said leg(s) fixed on a pier using a
wirerope, said under-bridge is operable to be driven forward and
backward by said erecting trolley through sprocket translation.
6. The system of claim 2, wherein, said under-bridge further
comprises a raising/lowering device, through which a set of said
foldable variable position platforms installed on both sides of
said under-bridge are elevatable; said foldable and elevatable
variable position platforms can be folded to be parallel with said
both sides respectively, and also can be unfolded to be
perpendicular to said both sides respectively.
7. A method for bridge erection using the system of claim 1,
comprising the steps of: placing a special launching carrier with
variable position platform on a first bridge abutment or a bridge
deck erected; regulating the horizontal height of said under-bridge
through said height regulating devices disposed on a rotatable rear
leg, a front roller, a middle roller and a rear roller; lowering
said rear roller through a leg spreader disposed on front end of
said under-bridge and fixing said rear roller on said first bridge
abutment or a bridge pier; driving said under-bridge located on
said rear roller forward until said leg spreader reaches a next
bridge pier as second bridge pier; placing and fixing said middle
roller and said front roller respectively connected with said leg
spreader on said second bridge pier; driving said under-bridge
forward and driving said special carrier for erecting beam backward
to prefabrication yard to load a bridge beam; driving said erecting
trolley disposed on said under-bridge to a position over said
middle roller, fixing said erecting trolley to said middle roller
with a wirerope, and driving said under-bridge forward through
sprocket translation until said leg spreader reaches a next bridge
pier as third bridge pier; releasing the fixation of said front
roller disposed under said under-bridge, moving said front roller
forward along said under-bridge to said third bridge pier, and
fixing said front roller on said third bridge pier; releasing the
fixation of said middle roller, moving said middle roller to a
position on said second bridge pier, where said front roller was
placed, and moving said erecting trolley to a position above said
middle roller; then fixing said middle roller on said second bridge
pier and connecting said middle roller with said erecting trolley
using a wirerope; driving said under-bridge forward via sprocket
translation, and stopping said under-bridge when said rotatable
rear leg disposed at tail portion of said under-bridge is apart
from a distance to said first bridge abutment or said bridge deck
erected, then rotating said rotatable rear leg to be perpendicular
to said under-bridge; driving said under-bridge backward in order
to form an appropriate space between said under-bridge and said
first bridge abutment, making said rotatable rear leg stand on said
first bridge abutment, fixing said under-bridge on said first
bridge abutment or said bridge deck erected, disconnecting said
wirerope from said erecting trolley and then driving said erecting
trolley back to the tail portion of said under-bridge; releasing
the fixations of said middle roller and said rear roller on said
second bridge pier and said first bridge pier or abutment
respectively, moving said middle roller to said third bridge pier
and fixing the same thereon, moving said rear roller to said second
bridge pier and fixing the same thereon; unfolding a set of
variable position platforms disposed on both sides of tail portion
of said under-bridge in order to allow said variable position
platforms to be perpendicular to said under-bridge; then regulating
the height of said variable position platforms via a
raising/lowering device in order to allow the top surface of said
platforms to be at the same level with that of a bridge deck; after
that, driving said special carrier for erecting beam to said first
bridge abutment or said bridge deck erected; regulating the height
of said erecting trolley, moving said special carrier for erecting
beam carrying a bridge beam towards said erecting trolley, moving
partial wheels of a front wheel group smoothly onto said variable
position platforms, and stopping said machine from moving when an
connecting seat of said machine moves to a position above said
erecting trolley; regulating the height of said front wheel group
in order to set said connecting seat to said erecting trolley, then
lifting said front wheel group up and driving both said machine
carrying said bridge beam and said erecting trolley forward until
said bridge beam moves to right erection position; releasing the
fixation of said under-bridge on said first bridge abutment or said
bridge deck erected, braking a rear wheel group of said special
carrier for erecting beam; driving said under-bridge forward using
said erecting trolley through said sprocket translation and
allowing tail end of said under-bridge to reach said second bridge
pier in order to vacate a position for bridge beam erection;
erecting bridge at said position, regulating the horizontal height
of said front wheel group to place said front wheel group on said
bridge deck erected and said variable position platforms, and
driving said special carrier for erecting beam back to
prefabrication yard to load a bridge beam for next erection;
re-implementing the steps of A-K for erecting next bridge beams
except for first and last spans of an entire bridge.
Description
RELATED APPLICATIONS
This application is a nationalization under 35 U.S.C. 371 of
PCT/CN2011/000528, filed Mar. 28, 2011, and published as WO
2011/143923 A1, on Nov. 24, 2011, which claims priority to Chinese
patent Application Serial No. 201010185308.X, filed May 19, 2010,
which applications and publications are incorporated herein by
reference in their entirety.
TECHNICAL FIELD
This invention relates to a special launching carrier with variable
position platform and a method for bridge erection using the
same.
BACKGROUNDS
Currently, the existing special launching carrier with
under-bridge, such as the one disclosed in Chinese patent document
No. ZL200420115944.4, may have the problem with erection for first
span at the entrance and exit of a tunnel or erection for a short
bridge (less than three spans) between two tunnels. It is due to
the fact that the size overlaid is larger than the size of cross
section of the tunnel and the horizontal height of a under-bridge
differs from that of a bridge abutment when a special carrier for
erecting beam and an under-bridge machine with platform are
utilized for bridge erection, which makes it difficult to erect the
first or the last span of an entire bridge, and also affect the
stability of operation of the system and the safety of
construction. This invention will provide a special launching
carrier with variable position platform for solving the above
problems.
SUMMARY OF THE INVENTION
In order to solve one problem mentioned, the invention provides a
special launching carrier with variable position platform that may
facilitate the erection of the first span of an entire bridge at
the entrance and exit of a tunnel or a short bridge between two
tunnels, in the circumstance that an entire bridge comprises less
than three spans, which may realize high stability of operation and
high effectiveness of erection. The invention further provides a
method for bridge erection using the system.
In this invention, a special launching carrier with variable
position platform, comprising:
a special carrier for erecting beam and an under-bridge machine
with platform;
wherein, the special carrier for erecting beam comprises a main
beam, on which a lifting device is disposed; a front wheel group
and a rear wheel group respectively connected with and disposed
under the main beam;
the under-bridge machine with platform comprises a under-bridge,
and also comprises a front roller, a middle roller and a rear
roller, disposed for supporting the under-bridge and operable to
move along the under-bridge through the rollers, and the
under-bridge machine with platform further comprises an erecting
trolley; the system further comprises a rotatable rear leg
connected with and disposed under the under-bridge, the rotatable
rear leg and the under-bridge are operable to be on the same line
or perpendicular with each other by rotating rotatable rear leg
backward and outward; and the rotatable rear leg, the front roller,
the middle roller, and the rear roller respectively has a height
regulating device installed thereon, in order to ensure an
appropriate horizontal height of the under-bridge; and a set of
foldable and elevatable variable position platforms installed on
both sides of the tail portion of the under-bridge, which allow the
front wheel group to move from abutment or bridge onto the
under-bridge smoothly.
The horizontal height of the under-bridge is regulated by altering
the lengths of the rotatable rear leg, the front roller, the middle
roller and the rear roller with the height regulating device.
The height of a connection part of the erecting trolley, which is
for connecting with and the special carrier for erecting beam, is
regulatable, in order to ensure a smooth movement of the special
carrier for erecting beam when the under-bridge position on height
is changed; when the erecting trolley moves onto the under-bridge,
the erecting trolley is operable to be connected with the leg(s)
fixed on a pier using a wirerope, the under-bridge is operable to
be driven forward and backward by the erecting trolley through
sprocket translation.
The system further comprises a rotatable rear leg connected with
and disposed under the under-bridge; the rotatable rear leg and the
under-bridge are operable to be on the same line or perpendicular
with each other by rotating the rotatable rear leg backward and
outward.
The under-bridge further comprises a raising/lowering device,
through which a set of the foldable variable position platforms
installed on both sides of the under-bridge are elevatable; the
foldable and variable position platforms can be folded to be
parallel with the both sides respectively, and also can be unfolded
to be perpendicular to the both sides respectively.
In this invention, the method for bridge erection using the system
of the present invention comprising:
placing a special launching carrier with variable position platform
on a first bridge abutment or a bridge deck erected;
regulating the horizontal height of the under-bridge through the
height regulating devices disposed on a rotatable rear leg, a front
roller, a middle roller and a rear roller;
lowering the rear roller through a leg spreader disposed on front
end of the under-bridge and fixing the rear roller on the first
bridge abutment or a first bridge pier;
B. driving the under-bridge located on the rear roller forward
until the leg spreader reaches a next bridge pier as second bridge
pier;
C. placing and fixing the middle roller and the front roller
respectively connected with the leg spreader on the second bridge
pier;
driving the under-bridge forward and driving the special carrier
for erecting beam backward to prefabrication yard to load a bridge
beam;
D. driving the erecting trolley disposed on the under-bridge to a
position over the middle roller, fixing the erecting trolley to the
middle roller with a wirerope, and driving the under-bridge forward
through sprocket translation until the leg spreader reaches a next
bridge pier as third bridge pier; E. releasing the fixation of the
front roller disposed under the under-bridge, moving the front
roller forward along the guider girder to the third bridge pier,
and fixing the front roller on the third bridge pier; releasing the
fixation of the middle roller, moving the middle roller to a
position on the second bridge pier, where the front roller was
placed, and moving the erecting trolley to a position above the
middle roller; then fixing the middle roller on the second bridge
pier and connecting the middle roller with the erecting trolley
using a wirerope; F. driving the under-bridge forward via sprocket
translation, and stopping the under-bridge when the rotatable rear
leg disposed at tail portion of the under-bridge is apart from a
distance to the first bridge abutment or the bridge deck erected,
then operating the rotatable rear leg to be perpendicular to the
under-bridge; G. driving the under-bridge backward in order to form
an appropriate space between the under-bridge and the first bridge
abutment, making the rotatable rear leg stand on the first bridge
abutment, fixing the under-bridge on the first bridge abutment or
the bridge deck erected, disconnecting the wirerope from the
erecting trolley and then driving the erecting trolley back to the
tail portion of the under-bridge; H. releasing the fixations of the
middle roller and the rear roller on the second bridge pier and the
first bridge pier respectively, moving the middle roller to the
third bridge pier and fixing the same thereon, moving the rear
roller to the second bridge pier and fixing the same thereon;
unfolding a set of variable position platforms disposed on both
sides of tail portion of the under-bridge in order to allow the
variable position platforms to be perpendicular to the
under-bridge; then regulating the height of the variable position
platforms via a raising/lowering device in order to allow the top
surface of the platforms to be at the same level with that of a
bridge deck; after that, driving the special carrier for erecting
beam to the first bridge abutment or the bridge deck erected; I.
regulating the height of the erecting trolley, moving the special
carrier for erecting beam carrying a bridge beam towards the
erecting trolley, moving partial wheels of a front wheel group
smoothly onto the variable position platforms, and stopping the
machine from moving when an connecting seat of the machine moves to
a position above the erecting trolley; regulating the height of the
front wheel group in order to set the connecting seat to the
erecting trolley, then lifting the front wheel group up and driving
both the machine carrying the bridge beam and the erecting trolley
forward until the bridge beam moves to right erection position; J.
releasing the fixation of the under-bridge on the first bridge
abutment or the bridge deck erected, braking a rear wheel group of
the special carrier for erecting beam; driving the under-bridge
forward using the erecting trolley through sprocket translation and
allowing tail end of the under-bridge to reach the second bridge
pier in order to vacate a position for bridge beam erection; K.
erecting bridge at the position, regulating the horizontal height
of the front wheel group to place the front wheel group on the
bridge deck erected and the variable position platforms, and
driving the special carrier for erecting beam back to
prefabrication yard to load a bridge beam for next erection; L.
re-implementing the steps of A-K for erecting next bridge beams
except for first and last spans of an entire bridge.
In comparison with the existing special launching carrier with
variable position platform, the system of this invention have some
advantages as follows:
1. the adaptability of installing a under-bridge is improved, due
to the fact that a rotatable rear leg is provided, which can be
rotated outward to be on the same line with a under-bridge, and be
rotated to be perpendicular with the under-bridge;
2. it may facilitate to erect a bridge deck with a particular size,
due to the fact that the height of the under-bridge position can be
regulated through a height regulating device installed on each
legs.
3. it may improve the stability of erection, the safety of
construction, simplify the working procedure, and improve the
effectiveness of erection, due to the fact that a set of foldable
and elevatable variable position platforms are installed on both
sides of tail portion of the under-bridge, which can be
perpendicular with the lateral face of the under-bridge and is
elevatable to be at the same level as the bridge abutment, so as to
allow the front wheel group to move onto the platform smoothly.
The system of this invention may solve the problem with the bridge
erection at the entrance and exit of a tunnel or in a tunnel, or
the bridge erection between two tunnels in the circumstance that
the entire bridge comprises less than three spans. It also help to
reasonably shorten the length of the under-bridge by retaining a
short distance between the end of the under-bridge and the bridge
abutment or the bridge deck erected, so as to improve the load
condition of the under-bridge, simplify the procedure, improve the
effectiveness of erection, safety and reliability.
The special launching carrier with variable position platform of
this invention will be illustrated further with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view of a special launching carrier with variable
position platform according to the invention;
FIG. 2 is a left side view of the unfolded variable position
platforms according to the invention;
FIG. 3 is a left side view of the folded variable position
platforms according to the invention;
FIG. 4 is a front view of the erecting trolley according to the
invention;
FIG. 5 and FIG. 6 are schematic views showing step 1 of the method
for erecting the first span according to the invention;
FIG. 7 and FIG. 8 are schematic views showing step 2 of the method
for erecting the first span according to the invention;
FIG. 9 and FIG. 10 are schematic views showing step 3 of the method
for erecting the first span according to the invention;
FIG. 11 and FIG. 12 are schematic views showing step 4 of the
method for erecting the first span according to the invention;
FIG. 13 and FIG. 14 are schematic views showing step 5 of the
method for erecting the first span according to the invention;
FIG. 15 and FIG. 16 are schematic views showing step 6 of the
method for erecting the first span according to the invention;
FIG. 17 and FIG. 18 are schematic views showing step 7 of the
method for erecting the first span according to the invention;
FIG. 19 and FIG. 20 are schematic views showing step 8 of the
method for erecting the first span according to the invention;
FIG. 21 and FIG. 22 are schematic views showing step 9 of the
method for erecting the first span according to the invention;
FIG. 23 and FIG. 24 are schematic views showing step 10 of the
method for erecting the first span according to the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to FIG. 1, a special launching carrier with variable
position platform according to this invention, comprise a special
carrier for erecting beam and an under-bridge machine with
platform; the special carrier for erecting beam comprises a main
beam 2, a front wheel group 5 and a rear wheel group 1, and the
front wheel group 5 and rear wheel group 1 are respectively
connected with and disposed under both ends of the main beam 2; a
lifting device including a pair of lifting mechanisms 4 are
disposed on the main beam 2;
the under-bridge machine with platform comprises a under-bridge 10,
a rotatable rear leg 7, a front roller 13, a middle roller 12, a
rear roller 11 and an erecting trolley 6; the front roller 13, the
middle roller 12 and the rear roller 11 that are disposed for
supporting the under-bridge 10 and operable to move along the
under-bridge 10 through the rollers; the erecting trolley 6 is
disposed on the under-bridge 10; and the rotatable rear leg 7 is
connected with and disposed under the under-bridge 10, and the
rotatable rear leg 7 and the under-bridge 10 are operable to be on
the same line or perpendicular with each other by rotating the
rotatable rear leg 7 backward and outward; height regulating
devices 15 may be installed on the rotatable rear leg 7, the front
roller 13, the middle roller 12 and the rear roller 11 in order to
ensure an appropriate horizontal height of the under-bridge 10, and
variable position platforms 8 are installed on both sides of the
tail portion of the under-bridge 10, which allow the front wheel
group 5 to move from bridge abutment or bridge beck onto the
under-bridge 10 smoothly.
Referring to FIG. 2, the left side view of under-bridge machine
with platform shows unfolded variable position platforms 8, here
the top surface of the displacements is at the same level with that
of bridge abutment or deck through raising/lowering device 9, and
partial wheels of front wheel group 5 move to the variable position
platforms smoothly.
Referring to FIG. 3, it shows the left side view of under-bridge
machine with platform, of which variable position platforms 8 are
folded, and the size of the under-bridge machine with platform may
be reduced by folding the platforms 8.
Referring to FIG. 4, according to the invention, the erecting
trolley 6 may be connected to the special carrier for erecting
beam, in order to ensure that the carrying of the front wheel group
5 is transferred to the erecting trolley 6 smoothly.
The height of a connection part of the erecting trolley 6, which is
for connecting with the special carrier for erecting beam, is
regulatable through the control of the hydraulic system, in order
to ensure a smooth movement of the special carrier for erecting
beam carrying a bridge beam when the under-bridge position on
height is changed.
When the trolley 6 moves onto the under-bridge 10, the trolley 6 is
operable to be connected with the leg(s) fixed on a pier using a
wirerope, the under-bridge 10 is operable to be driven forward and
backward by the trolley 6 through sprocket translation.
The erecting procedure of erection for first bridge deck described
as below will be taken as an example of carrying out the erecting
method of this invention.
The erecting procedure comprises the following steps:
referring to FIG. 5 and FIG. 6, the first step refers to placing a
special launching carrier with variable position platform on a
first bridge abutment; regulating the horizontal height of the
under-bridge 10 through the height regulating devices 15 disposed
on a rotatable rear leg 7, a front roller 13, a middle roller 12
and a rear roller 11; and then lowering the rear roller 11 through
a leg spreader 14 disposed on front end of the under-bridge 10 and
fixing the rear roller 11 on the first bridge abutment; and then
referring to FIG. 7 and FIG. 8, the second step refers to driving
the under-bridge 10 located on the rear roller 11 forward until the
leg spreader 14 reaches a next bridge pier as a second bridge pier;
and then referring to FIG. 9 and FIG. 10, the third step refers to
placing and fixing the middle roller 12 and the front roller 13
respectively connected with the leg spreader 14 on the second
bridge pier; driving the under-bridge 10 forward and driving the
special carrier for erecting beam backward to prefabrication yard
to load a bridge beam for next erection; and then referring to FIG.
11 and FIG. 12, the fourth step refers to driving the erecting
trolley 6 disposed on the under-bridge 10 to a position over the
middle roller 12, fixing the erecting trolley 6 to the middle
roller 12 with a wirerope 17, and driving the under-bridge 10
forward through sprocket translation until the leg spreader 14
reaches a next bridge pier as a third bridge pier; and then
referring to FIG. 13 and FIG. 14, the fifth step refers to
releasing the fixation of the front roller 13 disposed under the
under-bridge 10, moving the front roller 13 forward along the
guider girder 10 to the third bridge pier, and fixing the front
roller 13 on the third bridge pier; and then releasing the fixation
of the middle roller 12, moving the middle roller 12 to a position
on the second bridge pier, where the front roller 13 was placed,
and moving the erecting trolley 6 to a position above the middle
roller 12; then fixing the middle roller 12 on the second bridge
pier and connecting the middle roller 12 with the erecting trolley
6 using a wirerope 17; and then referring to FIG. 15 and FIG. 16,
the sixth step refers to driving the under-bridge 10 forward via
sprocket translation, and then stopping the under-bridge when the
rotatable rear leg 7 disposed at tail portion of the under-bridge
10 is apart from the first bridge abutment a distance, then
rotating the rotatable rear leg 7 to allow it to be perpendicular
to the under-bridge 10; and then referring to FIG. 17 and FIG. 18,
the seventh step refers to driving the under-bridge 10 backward in
order to form an appropriate space between the under-bridge 10 and
the first bridge abutment, making the rotatable rear leg 7 stand on
the first bridge abutment, fixing the under-bridge 10 on the first
bridge abutment, disconnecting the wirerope 17 from the erecting
trolley 6 and then driving the erecting trolley back to the tail
portion of the under-bridge 10; and then referring to FIG. 19 and
FIG. 20, the eighth step refers to releasing the fixations of the
middle roller 12 and the rear roller 11 on the second bridge pier
and the first bridge pier or abutment respectively, moving the
middle roller 12 to the third bridge pier and fixing the same
thereon, moving the rear roller 11 to the second bridge pier and
fixing the same thereon; unfolding a set of variable position
platforms 8 disposed on both sides of tail portion of the
under-bridge 10 in order to allow the variable position platforms
to be perpendicular to the under-bridge 10; then regulating the
height of the variable position platforms 8 via a raising/lowering
device 9 in order to allow the top surface of the platform 8 to be
at the same level with that of a bridge deck; after that, driving
the special carrier for erecting beam to the first bridge abutment
or the bridge deck erected; and then referring to FIG. 21 and FIG.
22, the ninth step refers to regulating the height of the erecting
trolley 6, moving the special carrier for erecting beam carrying a
bridge beam towards the erecting trolley 6, moving partial wheels
of a front wheel group 5 smoothly onto the variable position
platforms 8, and stopping the machine from moving when an
connecting seat 16 of the machine moves to a position above the
erecting trolley 6; regulating the height of the front wheel group
in order to fix the connecting seat 16 to the erecting trolley 6,
then lifting the front wheel group up and driving the machine
carrying the bridge beam and the erecting trolley 6 forward until
the bridge beam moves to an erection position;
Referring to FIG. 23 and FIG. 24, the tenth step refers to
releasing the fixation of the under-bridge 10 on the first bridge
abutment or the bridge deck erected, braking a rear wheel group 1
of the special carrier for erecting beam; driving the under-bridge
forward using the erecting trolley 6 through sprocket translation
and allowing tail end of the under-bridge 10 to reach the second
bridge pier in order to vacate a position for bridge beam erection
and then erecting bridge at the position, regulating the horizontal
height of the front wheel group 5 to place the front wheel group 5
on the bridge deck erected and the variable position platforms 8,
and driving the special carrier for erecting beam back to
prefabrication yard to load a bridge beam.
In normal erecting condition, next bridge decks except for first
last bridge span of an entire bridge can be erected by
re-implementing the steps 7-10.
While this invention is illustrated by means of a specific
embodiment, it is to be understood that numerous changes and
modifications may be made therein without departing from the spirit
and scope of the invention, as defined in the claims.
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